Name:Contamination
ManaCost:2 B
Types:Enchantment
K:UpkeepCost:Sac<1/Creature>
R:Event$ ProduceMana | ActiveZones$ Battlefield | ValidCard$ Land | ManaReplacement$ ProduceB | Description$ If a land is tapped for mana, it produces {B} instead of any other type and amount.
SVar:ProduceB:Any->B
SVar:RemAIDeck:True
SVar:NonStackingEffect:True
SVar:Picture:http://www.wizards.com/global/images/magic/general/contamination.jpg
Oracle:At the beginning of your upkeep, sacrifice Contamination unless you sacrifice a creature.\nIf a land is tapped for mana, it produces {B} instead of any other type and amount.